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A new route to prepare the mixed oxo-ethylidynecapped trinuclear tungsten(Ⅳ)cluster and the crystal structure of H_2Na_3[W_3O(CCH_3)(O_2CCH_3)_6(H_2O)_3][H_2W_(12)O_(40)]·13.5H_2O
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作者 YU,Xiu-Fen XU,Li Department of Chemitsry,Fuzhou University,Fuzhou,Fujian 350002 《Chinese Journal of Chemistry》 SCIE CAS CSCD 1992年第2期130-137,共0页
The synthesis and the structural characterization of the title compound HNa[WO(CCH)-(OCCH)(HO)][HWO]·13.5 HO are described.It is known that the mixed oxo-ethylidyne-capped tritungsten cluster can be obtaine... The synthesis and the structural characterization of the title compound HNa[WO(CCH)-(OCCH)(HO)][HWO]·13.5 HO are described.It is known that the mixed oxo-ethylidyne-capped tritungsten cluster can be obtained by Zn dust reduction of NaWO·2HO in acetic anhydride.The title compound has been characterized by X-ray diffraction,UV/VIS andH NMR spectra.The tungsten atoms in the cluster cation and anion are in the oxidation states of W(IV)and W(VI)respectively.The crystal is rhombohedral with the space group R32,a=17.058(3),c=49.665(9),γ=120°,V=12516(9),Z=6,final R=0.037 for 2071 reflections with I≥3σ(I).Boththe cluster cation and anion have a Csymmetry.The important interatomic distances in angstroms forthe cluster cation are:W—W,2.730(2);W—μ-O,2.00;W—O(carboxyl),2.12;W—O,2.18(2). 展开更多
关键词 A new route to prepare the mixed oxo-ethylidynecapped trinuclear tungsten H2O H2W O2CCH3 cluster and the crystal structure of H2Na3[W3O CCH3 Na
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